<!DOCTYPE html>
<html>
	<head>
			<meta charset="utf-8">
			<title></title>
			<script>
				//基本变量
				var a = 10;
				var s = "培优课程";
				var colors = ["red", "black", "blue"];
				
				console.log(colors);
				console.log(colors[2]);
				
				//函数定义（方法）
				function add(a, b){
					return a+b;
				}
				
				//函数调用
				var r = add( 10, 20 );
				console.log(r);
			</script>
		</head>
		<body>
		</body>
	</html>
